“Workplace,” the latest documentary from director Gary Hustwit, had a run of screenings at the Architecture & Design Film Festival last week. As the most recent entry in Hustwit’s series of design-focused films — preceded by the popular “Helvetica” as well as “Objectified” and “Urbanized” — it presents another opportunity to watch the director and his team dive into a discipline in a way that is both highly esoteric and highly accessible. Premiered at the Venice Biennale earlier this year, the film will be released by the director online later this fall.